Another "comeback" season would definitely have my attention.
shorebreaker420 - I watch them all I don't give a shit
This. 
It's only now I'm losing interest in it, it seems now the fights to get in the house are sick. Then they act like dickheads in the house, and it all turns a bit like a soap.
Didn't really like season 7
Season 8 got me back on board because of the talent in the fighters but season 9 was the last straw for me.
TenOfSwords -TUF starting going downhill when they eliminated the challenges, and made the fights 2 rounds.
I also disagree with their letting fighters stay in the "main house" after they lost; the old-school TUFs had a feel to them reminiscent of Agatha Christie's Ten Little Indians.
Wasn't the challenges just the first season? 
I watch everything MMA, from the UFC and downwards but I never watched TUF, not even when it was new. I am a fan of MMA but I despise reality TV.
I watch the fights afterwards but skip the show. Fighter's private lives are uninteresting to me.
Haven't watched since season 6. The lack of compelling/UFC level guys is one reason, but the character of the show seemed to change as well. More annoying personalities, and the fights blow because guys are fighting not to lose or just to win on the score cards.
It seems that fewer and fewer guys are getting shots after the show, is that accurate? They're not even fighting on the finale.
The lost me at Rampage.
When Joe Lauzon didn't make it to Lil' Evil's team who he had beaten in an earlier MMA bout.
Never missed a single TUF episode and never will. Its mma on tv so I watch.
Some seasons are better than others, this one is really bad but two seasons ago was good.
early on they did a good job of mixing it up. You had the coaches with rivalries that were entertaining, you had good fighters on the show and you had the reality tv/house drama. So it had something for everyone.
After season 8 they kind of went away from the house drama stuff, after season 10 the show has been really boring.
Coaches are boring, the fighters they had from season 11 to season 13 were just really not good at all. It rebounded with season 14 but the live season many thought wsa boring because you didnt have the house stuff and now this season you dont have good fighters, boring coaches and the house stuff is old and stale.
Putting a guys bed in the pool? I know some fans didnt like it but Leben pissing on a guys bed, guys fighting in the backyard, even pissing in fruit salad, that was nasty but it was entertaining reality tv. Plus those seasons you had good fighters.